Microsoft rated five of these bulletins as critical, meaning that the patches they contain should be applied as soon as possible.

Perhaps the set of critical patches that should be applied first is MS13-096, which addresses a vulnerability in Microsoft's GDI+ library for parsing TIFF image files. It is already being exploited by attackers.

The vulnerability affects mainly older Microsoft software, including Windows Vista, Office 2003, Office 2007 and Office 2010. It is already being used in targeted attacks in the Middle East and Asia.

Kandek noted that newer software tends to have fewer vulnerabilities than older software. "The newer software versions just have more security features. Windows 8.1 has more security features that Windows 8 which has more than Windows 7, which has many more than Windows XP," he said.

"Even if you are fully patched with Windows XP, you are running more of a risk than with a fully patched Windows 7 installation," Kandek said.

As an example, Kandek noted there has another zero-day vulnerability in the Windows XP kernel that this month's patch cycle has not addressed. A zero day vulnerability means that exploits have already been crafted that take advantage of a software flaw. In this case, an attacker can send the user a maliciously crafted PDF file that, when opened, can deposit code in the computer's memory that grants another user administrative access.

Qualys estimated that 15 percent of enterprise users are still running Windows XP. Though the percentage of XP users is rapidly declining, Kandek doubted that everyone will be off the OS by April 2014, when Microsoft will cease issuing security patches for Windows XP. "After April, these machines will be very quickly be easy targets," Kandek said.

Another critical set of patches come under the security bulletin MS13-097, which affects Internet Explorer. The bulletin indicated that these vulnerabilities are easy to exploit, such as by using a maliciously crafted webpage.

The third critical bulletin, MS13-105 addresses a number of flaws in Outlook Web Access that an attacker could use to gain access to Microsoft Exchange server by tricking the user into opening a documents with embedded malicious code.

The fourth critical bulletin, MS13-099, affects all desktop and server versions of Microsoft Windows, including Windows RT. This vulnerability, in the Windows Script functionality, allows a remote attacker to gain access to a computer through a website that hosts specially crafted content.

The final critical vulnerability for this month, addressed in MS13-098, allows attackers to add their own malware to software being installed on a computer over a network using the Authenticode signing algorithm.

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

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